//
//  AppDelegate.swift
//  SinaWeibo
//
//  Created by 王朝阳 on 2016/10/22.
//  Copyright © 2016年 wangzhaoyang. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        
        //实例化 Window
        window = UIWindow(frame: UIScreen.main.bounds)
        window?.backgroundColor = UIColor.white
        //设置成根控制器
        setupRootVc()
        window?.makeKeyAndVisible()
        //注册通知切换控制器
        NotificationCenter.default.addObserver(self, selector: #selector(switchRootVc(noti:)), name: NSNotification.Name(rawValue: SinaSwitchRootVCNoti), object: nil)
        return true
    }

    //设置根控制器
    func setupRootVc() {
        //用户如果登录了,展示欢迎界面
        if SinaUserAccountViewModel.sharedTools.isLogin {
            window?.rootViewController = SinaWelcomeViewController()
        }else {
            //如果用户没有登录,展示mianController, 即注册界面
            window?.rootViewController = SinaMainController()
        }
    }
    //切换控制器
    func switchRootVc(noti: Notification){
//        //如果noti.object == nil 就代表是从 OAuthVC发出的通知
//        //如果noti.object != nil 就代表是从欢迎控制器发的通知
        if noti.object == nil {
            window?.rootViewController = SinaWelcomeViewController()
        }else {
            window?.rootViewController = SinaMainController()
        }
    }
    //析构函数 销毁通知
    deinit {
        NotificationCenter.default.removeObserver(self)
    }
    func applicationWillResignActive(_ application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
    }

    func applicationDidEnterBackground(_ application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(_ application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }


}

